I bought this so my full size 9" mattress could be stored with the boxspring in a relatives dry basement. With two people easy to put on and sealed well.  I am ordering another for where we are not staying for our queen mattress just for protection from any dust mites or bed bugs since we are in a community living center.  We will put a regular padded mattress cover over the one we are using so the plastic is not right at our body while sleeping - we would be too warm.